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1a. Photosynthesis and chemosynthesis are the primary sources of energy in all environments. Photosynthesis is derived from sunlight and powers most ecosystems through plants and continues up the food chain. Chemosynthesis is the primary source of energy for areas without a source of sunlight such as subterranean caves and the deep ocean. Chemical compounds are broken down and reformed to provide energy.
2a.Food chains distribute energy throughout the ecosystem
2b. Energy is provided by the sun
3. ATP is used to store sunlight energy

1a. Sunlight affects temperatures, driving rainfall patterns along climate borders
1b. The heat would increase over time.
2a.The earth’s climate is primarily affected by ocean currents and wind transferring heat, the greenhouse effect, and finally sunlight levels in different climates.
2b. Massive
3. The size of the climate front would be directly proportional to the mass of the water content contained therein

14. E
15. B
16. D
17. C
18. A
19. Gases are creating by the reaction, which then disperse into the air
20. Chemical change
21. 36 grams

These are the answers for the second two sections (matching and questions and problems) of the 2.4 section review from Prentice Hall Chemistry. The first half can be found on our Chemistry Section Review 2.4 Part 1 page.

The second section of the first chapter of Larson Calculus and Analytic Geometry is about finding limits via graphical means. Here are some of the answers to the homework.
1. 1/3
2. Lim x2 [(x-2)/(x^2-4) = 0.25
3. Lim x0 = 0.2887
4. -0.25
5. -0.0625